From 6edaa7fcf287b92fb231a9e23cd6b5b0fc3dddb2 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Thu, 14 Jun 2012 11:04:49 -0700 Subject: [PATCH] drm/i915: add TDL unit clock gating disable for VLV Another required workaround for a potential hang: WaDisableTDLUnitClockGating. v2: only apply this to VLV, IVB doesn't need it anymore (Eugeni) References: https://bugs.freedesktop.org/show_bug.cgi?id=50245 Signed-off-by: Jesse Barnes Reviewed-by: Eugeni Dodonov Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 1 + drivers/gpu/drm/i915/intel_pm.c | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index e748f665a0d9..5d7cf5f7e750 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -4038,6 +4038,7 @@ #define GEN6_UCGCTL2 0x9404 # define GEN7_VDSUNIT_CLOCK_GATE_DISABLE (1 << 30) +# define GEN7_TDLUNIT_CLOCK_GATE_DISABLE (1 << 22) # define GEN6_RCZUNIT_CLOCK_GATE_DISABLE (1 << 13) # define GEN6_RCPBUNIT_CLOCK_GATE_DISABLE (1 << 12) # define GEN6_RCCUNIT_CLOCK_GATE_DISABLE (1 << 11) diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 83c0e226f50c..47c1a3e9b4af 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3512,6 +3512,7 @@ static void valleyview_init_clock_gating(struct drm_device *dev) */ I915_WRITE(GEN6_UCGCTL2, GEN7_VDSUNIT_CLOCK_GATE_DISABLE | + GEN7_TDLUNIT_CLOCK_GATE_DISABLE | GEN6_RCZUNIT_CLOCK_GATE_DISABLE | GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); -- 2.34.1